Calcutta Electric Supply Corporation [CESC] — huge amount of bill

Address:

CESC Limited CESC House Chowringhee Square Kolkata – 700001

Hi,
I can't understand when a single led bulb is used most of the times. The fan is used in only one room.in the kitchen led tube is kept on for hardly 1 hour and in the washroom it varies from 1-2 hours. There is a refrigerator that i use. The ac is in only one room used only for 30 - 45 minutes but not regularly. Still cesc is charginge me a huge amount of rs 4070. The bill date is 16/09/2020. My customer id is [protected].
I have called up the customer care and they are saying that it's based on my consumption. But when i told them that previously i used to receive bills with lesser amount and even requested them to check whether my meter is faulty or not or someone is stealing electricity by attaching some wires to the meter and i was informed by the customer care it can't be done.
I just can't figure out what is happening.
Regards,
Supritha chaudhuri